USGS Stream  
Gages  
REVIEW  
BY  
TIMUR SABITOV  
Data sources:  
SSDB – Stream Stats DB of gages  
SSNav – Stream Stats gages, navigation tool  
NWIS – USGS Water Data for the Nation  
NLDI - The Hydro Network-Linked Data Index  
Gages3 - ? Review by Michael Weizorak and others  
Nhdplus - National Hydrography Dataset High  
Resolution  
Data base resources  
Active services  
Key information  
Station id – used as a primary key to compare gages  
Station location – used as a metric to identify proximity of  
stations  
Station comid – used to compare existing services and  
results, relate basin characteristics to nhdplus data base  
Comid and DA review  
Network nav and gages3 443 sites have different comid or missing  
Network nav and nhd plus have 1153 sites of different or missing comid  
Network nav and comid nldi have 293 sites of different or missing comid  
Network nav and gages3 have 3964 sites with area difference above 10 km2,  
1877 sites with area difference above 100km2, 1080 sites with difference of 500  
and above, and 822 sites with difference above 1000km2.  
Network nav and nwis have 422 sites with difference in drainage areas above  
10km2, 1713 sites with difference in area above 100km2, 966 sites with difference  
above 500 and 719 sites with difference above 1000.  
Nwis and G3 have total of 27 sites with different drainage area.  
Proximity between stations (m)  
Proximity between stations (m)  
Proximity between stations (m)  
Proximity between stations (m)  
NWIS/GAGES3  
NLDI/REST